Fastener



Patented July 17, 1928.

UNITED STATES PATENT OFFICE.

VAL'IER H. PIERCE, OF WAITERTOWN, MASSACHUSETTS, ASSIGNOR TO CARRFASTENER COMPANY, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

FASTENER. f

Application led November 18, 1924. Serial No. 750,598.

This inventionA aims to provide kan improved separable fastener. 'A

'In the drawings, which illustrate a preferred embodiment of myinvention Figure l is a plan view of one corner of a carpet showing anunderlying fastener 1n dotted lines;

Fig.` 2 is an enlarged section on the line 2-2 of Fig. l;

Fig. 3 is a section of the parts as shown in Fig. 2, but showing thesocket being engaged with the stud;

Figs. 4, 5 and 6 include a plan, a side and a bottom view respectivelyof the socket; and

Figs. 7, 8 and 9 include. a plan, a side and a bottomview,`respectively, of the stud.

Referring to the embodiment of my in vention, as illustrated in thedrawings, I have shown a simple, inexpensive pressed metal fastenerhere-in vdescribed as a carpet fastener, but which may be used in manyother instances where a simple snap fastener may be useful.

The stud, as illustrated, is pressed from a single piece of metal andhas a fiat base portion l presenting an inner wall 2 and an outer wall3. These Walls are formed so as to provide a rounded ring-like portion 4connecting the upper ends thereof. The outer wall 3 is provided with anannular beaded portion or shoulder 5 providing a stud head and below thehead a neck for engagement.

with a socket.

Both walls 2 and 3 are spaced apart for purposes more fully hereinafterdisclosed. To permit contraction and expansion of the walls 2 and 3, Ihave divided them into a plurality of socket-engaging members by aplurality of narrow slots 6. The slots c ut through both walls andextend a slight distance into the baseportion of the stud (Fig. 7),thereby permitting the socket-engaging members to bend mostly uponstraight lines between the slots 6, in the material forming the base ofthe stud. If the slots stopped short of the base the socket-engagingmembers would bend on the curve of the wall 2 and would not be asresilient.

The stud may be secured to a flexible support or a rigid support asdesired, but I have preferred to show it secured to a relatively thinfloor 7 by means of a rivet Aa5. This rivet, as illustrated, is pressedfro.

jt a? the sind and 'tluougb un aperture in the floor so that a' vportionof it may be presented at the under side of the floor against which itis upset in the saine manner as an eyelet.

The socket, vwhich mayy be secured to a flexible support or to a rigidsupport, comprises a. casing-like portion 9 pressed from a single .pieceof metal and presenting a stud-receiving aperture 10, surrounded by acontinuous wall 1l preferably curved in cross-section as shown in Figs.2 and 3. This wall 1l is formed by bending or pressing a portion ofthemetal from the aperture 10 back upon the metal surrounding theaperture, and forms a smooth, guiding surface 4for cooperation with thestud during engagement and disengagement therewith. yAdjacent theperiphery of the easing, I have provided a curved supporting portion l2,which rests against the ioor and supports the socket when engaged withthe stud. At the outer periphery of the casing, I have provided aplurality of upwardly projecting attaching prongs 13, which pierce thewarp and weft threads of a carpet 14 and are bent outwardly anddownwardly to hook over the web of the carpet as more fully shown anddescribed in my (zo-pending application Serial No. 687,751', filedJanuary 22, 1924.

During engagement of the socket with the stud, as illustrated in Fig. 3,the resilient portions of the wall 3 bend from the ringlike portion 4and the wall 2 bends upon straight lines between the ends of the slots 6as hereinbefore described, thereby contracting the shoulder portion 5 ofthe wall 3. The head ofthe stud may then pass through the aperture l0 inthe socket and the socketengaging portions then expand so that the wall3 engages the wall Il surrounding the stud-receiving aperture l0. Thehead thereafter prevents separation of the stud and socket except whenan upward pull is exerted upon the carpet 14. Vhen the stud and socketare secured together, as shown in Fig. 2, l

the supporting portion l2 seats against the floor and supports theygreater part of any weight applied directly over the fastener.

Thus. the fastener is protected from distortion when a person steps uponthe carpet be understood that l have done so for pur poses otclarification only, my invention being best defined in the appendedclaims.

l claim:

l. A one-piece fastener stud comprising a lease portion, an annular'wall arising from said hase portion, a second annular wall extendingoutwardly and downwardly from said lirst mentioned wall to provide astud head and neck, and a plurality of slots eX- tending through bothwalls to permit contraction and expansi on thereof independently of eachother.

2. A one-piece fastener stud comprising a base portion, an annular wallarising from said. base portion, a second annular wall eX- tendin'goutwardly and downwardly from said first mentioned wall to provide astud head and neck, hoth of said walls slotted to provide resiliency andspaced apart so that n they may expand and contract independently ofeach other during engagement and disengagement o a cooperating socketand an attaching rivet pressed from the center of said loase portion forsecuring the stud to a support.

3. A one-piece fastener stud comprising a base portion, an annular wallarising from said base portion, a second annular wall eX- tendingoutwardly and downwardly from said first-mentioned wall. to provide astud head and neck, a plurality ol'V slots extending through both wallsto permit contraction jacent the upper edge oi said wall, said i secondwall terminating adjacent to the v plane of the base portion, aplurality of slots terminating in said hase and separating the wallsinto resilient socket-engaging memhers adapted to flex upon straightlines passing` through said leasel between the ends of said slots, and atubular rivet portion pressed from said base to secure the stud to asuitable support.

ln testimony whereof, I have signed my name to this spec1ication.

WALTER H. PIERCE.

